PROBLEM 1 (25 points) Mall security estimates that the average daily per-store theft is less than $250, but wants to determine the accuracy of this...

PROBLEM 1 (25 points)

Mall security estimates that the average daily per-store theft is less than $250, but wants to determine the accuracy of this statistic. The company researcher takes a sample of 81 clerks and finds that =$220 and s = $40.

a) Test at α = .01

b) Construct a 90% CIE of μ